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Finding the Fourth Proportional to 620.84, 931.37 and 255.42

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Solution

The fourth proportional to 620.84, 931.37 and 255.42 is: 383.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.84 : 931.37 = 255.42 : x
  2. Step 2: Convert to fraction form
    620.84/931.37 = 255.42/x
  3. Step 3: Cross multiply
    620.84x = 931.37 × 255.42
  4. Step 4: Simplify right side
    620.84x = 237,889.25
  5. Step 5: Solve for x
    x = 237,889.25/620.84
  6. Step 6: Final answer
    x = 383.18

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